JP2633722B2 - Wire end bending device for electric wires - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for bending an exposed core of a wire terminal in a step of connecting a terminal to the wire terminal after stripping.

[Conventional technology and its problems]

As a conventional technique for bending the exposed core of the wire terminal and connecting the terminal to the terminal, there is one disclosed in Japanese Patent Publication No. 52-27833. In the technique, as shown in FIG. 2, the wire end P after stripping is first supported and fixed by a clamp 11, and as shown in FIG. Is bent downward, the punch 12 and the anvil 13 are moved to the wire terminal P side as shown by the arrow, and the terminal b is anviled.
13 Send on. At this time, as shown in FIG. 4, by feeding the terminal b, the downwardly bent core wire a is further bent along the insulation coating in the direction of the electric wire axis, and the crimper 14 is lowered to move the terminal b Caulking, 5th
As shown in the figure, a terminal b is attached to the electric wire terminal P, and a core wire a is connected to the terminal b.

In this technique, after bending by the press-down punch 12, due to the restoring force of the core a, the terminal b is attached without the core a along the insulating coating as shown in FIG. As shown in FIG. 7, since the core wire a is not bent sufficiently, the edge of the terminal b comes into contact with the core wire a when the terminal b is inserted, and the core wire a may be lost.

This connection failure and loss are caused by the wound wire shown in FIG.
It occurs very frequently in resistance string type electric wires. That is, as shown in the figure, the electric wire has a core 2 formed by a member that is softened and deformed by heat on the outer periphery of a tension member 1 such as aramid fiber, and a resistance wire (conductor) 3 is formed on the outer periphery in a spiral shape. After winding, the insulator 4 and the sheath 5 are covered.

This wire is stripped of a required length of the insulator 4 and the sheath 5 (hereinafter, both are referred to as an insulating coating) by a strip, and is brought into a state shown in FIG. Done. At this time, since the tension member 1 and the core 2 have an elastic restoring property, the core wire a (the tension member 1, the core 2 and the conductor 3) is easily returned after being bent, and the connection failure and the defect are liable to occur.

The present invention eliminates the return after bending of the core wire,
It is an object of the present invention to make the above connection failure and loss less likely to occur.

[Means for solving the problem]

In order to solve the above problems, in the present invention,
A clamp for supporting and fixing an electric wire terminal is provided on a frame, and a vertical heating punch that advances and retreats beyond the core wire with respect to the exposed core wire at a position corresponding to the exposed core wire of the supported and fixed electric wire terminal of the frame. A horizontal heating punch moving in the axial direction of the wire terminal, while being provided movably in a state of being separated from the insulating coating end surface of the wire terminal by the thickness of the exposed core wire, and providing an insulating coating end surface of the wire terminal. From the inside to the inside thereof with the exposed core wire interposed therebetween so as to be movable along the insulating coating.

[Action]

In the present invention configured as described above, first, the stripped wire end is inserted into the clamp and supported and fixed. In this state, when the vertical heating punch is moved toward the exposed core, the core is bent and heated, and subsequently, when the horizontal heating punch is moved, the bent core is further applied to the insulating coating of the electric wire. It is folded and heated. By this heating, the core wire is made permanent and maintains its bent state. That is, there is no return.

A terminal is attached to the end of the wire where the core wire is bent in the same manner as in the related art.

〔Example〕

As shown in FIG. 1, similarly to FIG. 2, a clamp 11 for supporting and fixing the wire end P is provided on the frame, and the required length of the wire end P is inserted through the clamp 11 to be positioned and supported and fixed. I do. The required length is appropriately determined by controlling the stroke of the insertion jig of the wire terminal P or the like. The operation of the clamp 11 is performed by a motor 15 via an appropriate gear mechanism.

A vertical heating punch is placed around the wire end P that is supported and fixed.
A frame 16 and a horizontal heating punch 17 are provided on the frame F so as to be movable in the vertical and horizontal directions, respectively. Heating of both punches 16 and 17 can employ a known means such as embedding of a heating wire.

A presser 20 is provided so as to be able to move up and down on the clamp 11 side from both the punches 16 and 17 around the wire end P, and the presser 20 is lowered by the cylinder 21 to contact the wire end P. Contact and maintain that state.

This embodiment has the above configuration. First, the terminal P of the wound wire shown in FIG. 8 is stripped, and the wire terminal P is inserted into the clamp 11 to be supported and fixed. In this state, when the vertical heating punch 16 moves toward the exposed core line a as shown by the chain line in FIG. 1, the core line a is bent and heated as shown by the chain line in FIG. When the horizontal heating punch 17 moves after the holding member 20 descends to prevent the wire terminal P from bending upward, the bent core wire a further moves along the insulating coatings 4 and 5 of the wire terminal P. It is bent and heated. By this heating, the core wire a is subjected to permanent processing,
As shown in the figure, the folded state is maintained.

A fifth end of the bent wire end P of the core wire a
As shown in the figure, the terminal b is attached in the same manner as in the prior art.

The insertion of the wire terminal P into the clamp 11, the operation of the motor 15 for the clamp 11, the cylinders 18 and 19 for the heating punches 16 and 17, and the cylinder 21 for the presser 20 may be performed manually, but is preferably controlled automatically. .

In this embodiment, the electric wire was bent as shown in FIG. 8, but the same effect can be obtained even if the conductor 3 is braided in FIG. I got it. In addition, the present invention can be applied to the bending process of the core wire a in an electric wire other than the embodiment, and it goes without saying that the effect can be obtained.

Further, in the embodiment, the frame F is provided with the above-mentioned conventional anvil 13, crimper 14, etc.
After the bending process, the terminal b can be continuously attached by the bending process.

〔The invention's effect〕

Since the present invention is configured as described above and the core wire after bending is subjected to permanent processing, the core wire may be lost at the terminal edge when the terminal is attached, or the bending degree may be poor. As a result, there is no danger of a terminal failure occurring.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of a wire terminal core wire bending apparatus according to the present invention, FIG. 2 to FIG. 4 are explanatory views of a conventional operation, and FIG. 5 to FIG. FIG. 8 is a front view showing the respective examples, and FIG. P ... wire end, F ... frame, a ... core wire, b ...
Terminal 1, tension member 2, core 3, resistance wire (conductor) 4, insulator 5, sheath 11, clamp 15, motor 16, vertical heating punch, 17 Horizontal heating punch, 18, 19, 21 Cylinder, 20 Holder.

Claims (1)

(57) [Claims] A clamp for supporting and fixing an end of an electric wire is provided on a frame, and the clamp is moved to a position corresponding to an exposed core of the end of the supported and fixed electric wire over the exposed core. A vertical heating punch, which is provided so as to be movable in a state apart from the insulating coating end face of the wire end by the thickness of the exposed core wire, and a horizontal heating punch that moves in the axial direction of the wire end, A terminal wire bending apparatus for an electric wire, which is provided so as to be movable along the insulating cover with the exposed conductive wire interposed from the end surface of the insulating cover of the terminal toward the inside thereof.